The UK's most complete GLP-1 guide
Every Question Answered. Every Side Effect Explained.
- How GLP-1 medications work
- Mounjaro vs Wegovy compared
- Injection instructions
- Side effects & solutions
- What to eat on treatment
- FAQs answered
Free tracker included with every download this week
How Much Does Munjaro Cost in the UK?
Munjaro (tirzepatide) is a prescription-only weight loss injection available in the UK through both NHS specialist services and private prescribing routes. The cost varies significantly depending on whether you access it privately or through the NHS, which dose you're prescribed, and which provider dispenses your medication. Understanding the pricing helps you plan your weight management journey alongside our free GLP-1 weight loss calculator, which can help you estimate potential results at different doses.
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Calculate Your BMI Instantly
Enter your height and weight below. Supports both imperial (stone & lbs) and metric (kg). Results include NHS category, healthy weight range, and ethnicity adjustments.
What Is BMI and Why Does It Matter?
Body Mass Index (BMI) is the most widely used screening tool for assessing whether your weight falls within a healthy range. Used by the NHS, GPs, and weight management services across the UK, BMI provides a quick snapshot of your weight relative to your height. The formula is simple: your weight in kilograms divided by your height in metres squared (kg/m²).
While BMI isn't a perfect measure — it doesn't account for muscle mass, bone density, or fat distribution — it remains the standard first step in identifying potential weight-related health risks including type 2 diabetes, cardiovascular disease, high blood pressure, and certain cancers.
The NHS also recommends adjusted thresholds for people of South Asian, Chinese, or Black African heritage — a BMI of 23 or above is classified as overweight, and 27.5 as obese. Our calculator includes this adjustment as a one-click toggle.
Munjaro Pricing in the UK
Private Munjaro costs typically range from £129 to £320 per month, depending on your dose and which GPhC-registered pharmacy you use. The KwikPen device contains four doses (a four-week supply), so monthly pricing reflects the dose level you're prescribed. Starting doses (2.5 mg) are generally cheaper than maximum doses (15 mg). Each dose increase incurs a higher cost, though prices vary between providers — shopping around can save you money. Private access doesn't require NHS referral and is often faster than NHS waiting lists, though you'll pay the full cost yourself. Some people budget £150–£250 monthly for ongoing treatment.
- NHS access: Free through specialist weight management services if approved, but availability varies widely by region and waiting times can be lengthy
- Private prescribing: Online consultations with UK-licensed prescribers (typically £25–£50), then pharmacy costs on top
- Dose-dependent pricing: Lower doses cost less than higher maintenance doses
- Annual cost estimate: Private access approximately £1,500–£3,850 per year
Clinically BackedWeight Loss
No appointments. No waiting rooms. Just care — from a UK-regulated online pharmacy.
How It Works
Three simple steps to understand your weight and take action.
Enter your height and weight in our free calculator. Get your BMI, NHS category, healthy weight range, and ethnicity-adjusted thresholds instantly.
If your BMI suggests you're overweight or obese, explore our GLP-1 calculators to project potential weight loss on Mounjaro or Wegovy.
Use our progress tracker to log your weight weekly, visualise your journey with charts, and stay motivated — all stored privately in your browser.
Free Weight Loss Tools & Guides
Everything you need to understand your weight, explore medication options, and track your progress — completely free.
Factors Affecting Your Munjaro Costs
Several factors influence what you'll pay for Munjaro. Prescription dose is the largest variable — starting at 2.5 mg and potentially escalating to 15 mg, with each dose level costing more. Your prescriber and pharmacy choice matter significantly; different private providers charge different rates for the same dose. Treatment duration affects total cost — some people use Munjaro for several months, others for years. Additional consultations with your prescriber (required every 4–12 weeks to monitor your progress) may incur fees on top of medication costs. Compare costs across multiple providers before committing, and ask whether follow-up consultations are included in the price or charged separately.
- Dual GIP/GLP-1 receptor agonist
- Up to 22.5% body weight loss (SURMOUNT-1)
- Weekly injection, dose escalation over 20+ weeks
- Available via private prescription in the UK
- Doses: 2.5mg → 5mg → 7.5mg → 10mg → 12.5mg → 15mg
- GLP-1 receptor agonist
- Up to 15–17% body weight loss (STEP trials)
- Weekly injection, 5-step dose escalation
- NHS & private prescription available
- Doses: 0.25mg → 0.5mg → 1mg → 1.7mg → 2.4mg
Mounjaro vs Wegovy: Head-to-Head
A side-by-side comparison of the two most popular GLP-1 weight loss medications available in the UK.
| Feature | Mounjaro | Wegovy |
|---|---|---|
| Drug class | Dual GIP/GLP-1 agonist | GLP-1 agonist |
| Active ingredient | Tirzepatide | Semaglutide |
| Avg. weight loss | 15–22.5% | 12–17% |
| Key trial | SURMOUNT-1 (2022) | STEP 1 (2021) |
| Max dose | 15 mg weekly | 2.4 mg weekly |
| Escalation period | 20–32 weeks | 16–20 weeks |
| Administration | Weekly injection (pen) | Weekly injection (pen) |
| NHS availability | Private prescription only | NHS & private |
| Approx. private cost | £150–£250/month | £150–£300/month |
| Common side effects | Nausea, diarrhoea, constipation | Nausea, vomiting, diarrhoea |
Data sourced from SURMOUNT-1 and STEP 1 clinical trials. Costs are approximate and vary by provider. Always consult a prescriber.
Am I Eligible for Weight Loss Medication?
In the UK, eligibility for GLP-1 weight loss medications like Mounjaro and Wegovy is based on your BMI and overall health profile.
- BMI of 30 or above (obese)
- Age 18 or over
- No contraindicated conditions
- Committed to lifestyle changes
- BMI of 27 or above
- Plus type 2 diabetes
- Or high blood pressure
- Or obstructive sleep apnoea
Use our BMI calculator to check whether your BMI falls within the eligible range.
How We Built These Tools
Every calculator and guide on myweightcheck is built with accuracy and transparency in mind. Our BMI calculator uses the standard WHO formula with NHS-aligned category thresholds. Our GLP-1 projections are modelled on published clinical trial data from SURMOUNT and STEP studies.
All data stays on your device. We don't require sign-ups, and we don't store your health information on any server. Your progress tracker saves data locally in your browser using localStorage, so only you can see it.
We're based in the UK and our tools are designed specifically for UK users — supporting stone & lbs by default, referencing NHS guidelines, using NICE-approved medication data, and linking to GPhC-registered pharmacies.
Frequently Asked Questions
Common questions about BMI, weight loss medications, and our free UK tools.
Is Munjaro free on the NHS in the UK?
Munjaro is free through NHS specialist weight management services if you meet eligibility criteria (BMI 30+ or 27+ with weight-related health conditions) and are approved. However, NHS availability varies by region and waiting lists are often very long. Private access bypasses NHS waiting lists but costs £129–£320 per month depending on dose and provider.
Why does Munjaro cost more at higher doses?
Each KwikPen contains four weekly doses at a fixed strength. Higher strength pens (like 15 mg) cost more to manufacture and distribute than lower strength pens (like 2.5 mg). You're billed based on the dose level your prescriber recommends, which typically increases as you progress through the titration schedule over 16–20 weeks.
Can I get a cheaper Munjaro alternative?
Wegovy (semaglutide), another GLP-1 receptor agonist, is also available privately in the UK and may have different pricing. Saxenda (liraglutide) is also licensed for weight management. Costs and availability vary by medication. Use our free GLP-1 weight loss calculator to compare potential outcomes, then discuss options with a prescriber.
Are there hidden costs beyond the Munjaro injection price?
Yes — prescription fees (typically £25–£50), follow-up consultations (may be charged separately), and potentially additional blood tests or GP appointments. Ask your private provider upfront whether consultations and monitoring are included in their advertised price or charged extra.
What's the difference between private Munjaro cost and NHS cost?
NHS Munjaro is free but requires referral to specialist services with potentially months-long waiting lists. Private costs £129–£320 per month but you avoid NHS queues and can start treatment sooner. Both routes require prescription and clinical assessment — tirzepatide is never available over-the-counter.
Ready to take control of your weight loss journey?
Start with a free BMI check, explore your GLP-1 options, or begin tracking your progress today. No sign-up. No cost. Just results.